the synopsis does NOT do this manga justice. this dude is not two-timing, he is hella polyamorous and i love him for that. the fact that they call it two-timing, even in a scenario such as this one is either just to appeal to the synopsis, or is just a bit polyphobic. this dude is setting up his polycule and is getting mad shit that he doesnt deserve for it. he is a good guy, which is demonstrated many times throughout the entire manga. this would not work if he wasnt. both of these girls love him, and he loves both of these girls; there is nothing more to it.